Improvement in hot-air furnaces



UNIT D STATES PATENT OFFICE; j

JOHN F. PEASE, 0F SYBAOUSE,'- NEw-YoR K. j

IMPROVEMENT m HOT-AIR FURNACES.

Specification forming part of Letters Patent No. 171,846, dated January 4, 1876; application'filed I December 8, 1875.

To all whom it may concern gases that may ascend in the feed-pot, e, which- Q Be it known that I, JOHN F. PEASE, of is directly'underit, and ofwhich it is 'an-'ex- Syracuse, ,in the county of Onondaga, in the tension. By the combination of the feed-pot State of New York, have invented a new and c with the .flaring combustion-chamber Band useful Improvement in Hot-Air Furnaces, of cap 0, in the manner shown and described, which the following, taken in connection with the heat is thrown out against the sides of the the accompanying drawing, isafull, clear, and furnace without in the least impairing the exact description. draft, and by the novel and simple construc- My invention relates to an improved contion of the feed-pot e and cap a and their construction and combination of the integrant nection the feed-pot is easily applied or reparts of a hot-air furnace, which renders the moved, and by the combination of the dome furnace self-feeding, and increases its heating d with the parts aforesaid, and its position in capacity, and at the same time renders it cheap the furnace, and its height relative to the feedaud simple in construction, and capable of door and the furnace, as herein described, the being readily taken apart. furnace is rendered self-feeding, and its radi- In the accompanying drawing, Figure 1 is ating-surface greatly increased. At the same an exterior view of that portion of the furtime the dome is attached to the furnace in nace to which my improvements are applied; such a manner that it can be readily detached and Fig. 2, a transverse section of same, showand replaced. a is a pipe attached to the top ing more fully the construction and combinaof the dome d, and extended to the exit-flue tion of the several parts. or chimney, and provided with a valve or Similar letters of reference indicate corredamper, 0, which is opened to allow the gases sponding parts. that may have accumulated in the top of the Ais the fire-pot; B, the combustioncham dome d to escape before opening the feedber, increasing in circumference from its base door g. For the purpose of obtaining greater to its junction with the cap 0. The latter is room for the gases that ascend in the dome of the form of a top section of an annular the damper 0 is placed some distance from the flue, convexed or semicircular in crosssection dome. 1 of its body, and supported at its outer edge Any one of ordinary mechanical skill will in a cup-shaped flange on the top edge of the perceive at a glance the advantages of this combustion-chamber. The inner bottom edge improved construction and combination of or small circumference of the annular cap cis the dome, feed-pot, and the cap or ring 0, provided with an upward-projecting flange, which supports them. The feed-pot being the which forms an annular cap or U-shaped part most exposed to the fire, and requiring groove, u, extending around the said edge. removal, is readily removed bodily through This groove uanswers two purposes,'namely: the top opening after the dome d has been re- First, it supports the feed-pot e, which is susmoved, which latter is equally as easy and in pended therefrom by hooks h cast on the top like manner accomplished. edge of the feed-pot; and, second, it furnishes By the semicircular form of the body of the a sand-joint for the dome d, which rests therecap or ring 0, audits increased circumference, in. This dome, for the purpose of facilitating the radiating-surface of the furnace is greatly the molding and casting of same, and its atincreased, and the escape of the heat through tachment and removal from the furnace, is the smoke-flue retarded. The feed-pot c, made of a straight cylindrical body and hemithrowing the fire out, brings the same more spherical top, and is void of flanges or 'prointimately in contact with the cap 0. jections on its sides. It projects upward Having thus fully described my invention, through the circular opening formed by the whatI claim as new, and desire to secure by annular smoke-flue f mounted on top of the Letters Patent, iscap 0 to an elevation of about two or three 1. In combination with the flaring combusinches above the highest point of the feedtion chamber B the annular cap or ring 0, of door, 9, and forms a chamber at the top for semicircular form in cross-section of-its body,

its body cylindric and the top semicircular in form, and divested of flanges or projections on its sides, in combinationwwithiathe feediimt 0, having outward-turned hooks h on top, en-

gaging the free top edge of the flange u, an-'[ nular cap, or iringi c, :ofcsemicirculan i'ormwin cross-sectionof its body, and provided with the cup-shaped flange u, around the bottom edge of the small circumference of the ring,

and the flaring combustio st-ructed and combined n-chamber B, allcon, substantially; in the manner shown anddescribed, for thepnrpose setforthi i y 1 3. Incombination with the dome 11, having its top hemispherical in form, and extended al)0v-e- -the-annular smoke-flue f and feed-door g, in the manner described and shown, the lpipeing having, at adistance from its intersection with the dome, the valve 0, substantially as and for the purposespecified. Inntestimonylwhereof 1 I have signed my name and affixed my seal, in the presence of tivoattesting witnesses, at Syracuse, in the countywofri-Onondaga andStateiofl'Newiork, tliis2d-day of December, 1875.

JOHN F. PEASE. [L. 8.]

Witnesses:

E. LAASS- i t CHRISTIAN HOLMST RUPP, Jr. 

